There are currently a few pull requests related to interfacing to
C's long double type on Win64, most of which have been already
merged:
- https://github.com/D-Programming-Language/dmd/pull/3981
- https://github.com/D-Programming-Language/druntime/pull/958
- https://github.com/D-Programming-Language/dmd/pull/3990
At first glance, this solution does not seem to be very appealing
to me:
1. We need to teach everybody to not use 'real' when declaring C
APIs, even though it's currently all over the place.
2. It effectively forces everybody to make all conversions to
long double explicit in their code, at least if it they want to
be cross-platform compatible. As the conversion will still be
implicit on all platforms other than Win64 (and potentially some
GDC/LDC targets), it seems like this could turn into another
size_t-style portability trap.
I guess this has already been discussed more extensively, though.
I even seem to remember talking about making real equivalent to
the 64 bit long double type on MSVC targets (which IIRC GDC is
going to do anyway). As I've been more or less out of the loop
for a while, could somebody please point me to the relevant
threads/issues/DIPs/…?
Cheers,
David
